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Mimecast Email Security vs Sophos Email comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on May 21, 2025

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

ROI

Sentiment score
6.6
Mimecast Email Security effectively prevents phishing, enhancing security and providing significant protection despite challenges in quantifying ROI.
Sentiment score
7.4
Sophos Email offers strong ROI by improving efficiency, cutting costs, enhancing security, and reducing unsolicited emails, benefiting compliance.
There is definitely a return on investment when using Mimecast, as it blocks phishing emails, reducing the risk of significant financial losses.
 

Customer Service

Sentiment score
5.8
Mimecast Email Security's customer service is mixed, with responsiveness praised by some, but issues with waiting times noted by others.
Sentiment score
6.7
Sophos Email support responsiveness varies; users report mixed experiences with speed and effectiveness, especially for complex issues.
Support personnel are hesitant to engage in remote sessions, preferring to share documentation via email.
Mimecast technical support is generally quite good.
When I reported a problem with our firewall, they acted promptly and delivered another piece of equipment.
The technical support from Sophos Email deserves a rating of 10 out of 10.
 

Scalability Issues

Sentiment score
7.2
Mimecast Email Security is a scalable SaaS solution, praised for flexibility and effectiveness across various organization sizes and industries.
Sentiment score
7.4
Sophos Email is scalable, praised for handling various organization sizes, but faces cost and support issues when scaling.
 

Stability Issues

Sentiment score
7.5
Mimecast Email Security is generally stable and reliable, with rare bugs, occasional minor issues, and minimal downtime reported.
Sentiment score
7.8
Sophos Email is praised for stability and reliability, deemed a dependable choice for organizations despite minor user suggestions for improvement.
 

Room For Improvement

Mimecast Email Security requires pricing, detection, user interface improvements, better support, and enhanced AI integration for smoother operations.
Sophos Email needs improved security features, integration, user interface, and support to enhance performance, accuracy, and user experience.
A lot of emails were missed despite being known samples.
We discussed the phishing aspect, the DNS system, and the key rotation.
Sophos Email does not work with split delivery.
 

Setup Cost

Mimecast Email Security offers comprehensive features but is considered premium, with variable pricing flexibility and additional support costs.
Sophos Email offers competitive, flexible subscription pricing with discounts, deemed fair and valuable by most users despite some cost concerns.
The pricing is higher for Mimecast, particularly for the Indian market, where it is considered expensive.
Sophos Email pricing is a bit high, especially since I purchase through a partner, and they sell it at a higher price since they also seek to make a profit.
 

Valuable Features

Mimecast Email Security offers strong threat protection, seamless Microsoft 365 integration, and user-friendly features for comprehensive email threat mitigation.
Sophos Email provides advanced security features and easy management, making it a top choice for protecting organizational communications.
A distinct advantage of Mimecast is its ability to block phishing and impostor attacks, which are significant threats currently.
One of the most useful features is the threat remediation module, which can be used to remove malicious emails that may have been delivered or manually remove them.
It provides a defense layer for email protection, scanning every incoming and outbound email for malware and spam.
The spam reduction feature in Sophos Email provides comfort when using it.
 

Categories and Ranking

Mimecast Email Security
Ranking in Office 365 Protection
3rd
Average Rating
8.0
Reviews Sentiment
6.2
Number of Reviews
31
Ranking in other categories
Secure Email Gateway (SEG) (4th)
Sophos Email
Ranking in Office 365 Protection
1st
Average Rating
8.2
Reviews Sentiment
6.9
Number of Reviews
33
Ranking in other categories
Email Security (10th)
 

Mindshare comparison

As of August 2025, in the Office 365 Protection category, the mindshare of Mimecast Email Security is 19.9%, up from 11.9% compared to the previous year. The mindshare of Sophos Email is 10.5%, down from 19.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Office 365 Protection Market Share Distribution
ProductMarket Share (%)
Sophos Email10.5%
Mimecast Email Security19.9%
Other69.6%
Office 365 Protection
 

Featured Reviews

ShaheenKapery - PeerSpot reviewer
Provides valuable security features and has a straightforward setup process
The initial setup process is straightforward and takes a weekend at most. A .com domain can take up to forty-eight hours, while a local domain takes about four to eight hours because it has to propagate through the international DNS records. It is a cloud-only solution. If you're managing email security on-premises, you use your bandwidth to download emails, including spam, and then use your servers to clean it up. For example, say a third of your email is spam; this consumes significant bandwidth and resources. However, if you use Mimecast, they filter the emails on their servers before delivering them to you. It can be a major selling point in regions with expensive bandwidth, such as Africa. You can save bandwidth and improve overall efficiency by offloading the spam filtering to Mimecast.
BhanuPrakash - PeerSpot reviewer
Achieving Seamless Email Security and Encryption while Managing Temporary Email Storage Limits
We continue to use Sophos products and remain with the company. For firewall protection, we use XGS systems. We have provided Sophos Email Gateway for one of our clients. We have integrated Sophos Email with our internal email server, using it for both outbound and inbound traffic. Integration with Office 365 protection for Sophos Email Security works smoothly without any challenges. The solution is totally cloud-based. I recommend Sophos Email for mid-sized companies as it is a good option, though it may not be ideal for large-scale or small businesses. I have not tried incorporating AI technology with Sophos Email yet. I am Bhanu Prakash, Technical Head for Systek Services, and can be reached at b.hanu@teamsistek.com. I am a partner with Sophos. Overall rating for Sophos Email: 10/10.
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Top Industries

By visitors reading reviews
Computer Software Company
15%
Financial Services Firm
7%
Manufacturing Company
7%
Comms Service Provider
6%
Computer Software Company
12%
Manufacturing Company
10%
Financial Services Firm
7%
Healthcare Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business15
Midsize Enterprise7
Large Enterprise11
By reviewers
Company SizeCount
Small Business25
Midsize Enterprise3
Large Enterprise5
 

Questions from the Community

What do you like most about Mimecast Email Security with Targeted Threat Protection?
The interface of this solution is very easy to navigate and user-friendly. There is no delivery in email and other communications, making it reliable. The configuration is relatively easy.
What needs improvement with Mimecast Email Security with Targeted Threat Protection?
If I ask you about the room for improvement, we discussed the phishing aspect, the DNS system, and the key rotation. Apart from that, are there any other areas that you would like to see improved o...
What do you like most about Sophos Email?
The solution's identity proxy feature is very good and reliable.
What is your experience regarding pricing and costs for Sophos Email?
Regarding Sophos Email pricing, I would rate it between six or seven out of ten.
What needs improvement with Sophos Email?
While Sophos Email is generally sufficient, one challenge we face is the 24-hour email storage limitation. This presents an issue when internal systems are down for more than 24 hours. The solution...
 

Also Known As

Mimecast Email Security with Targeted Threat Protection
Sophos Email Security
 

Overview

 

Sample Customers

Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Del Monte Foods, Terra Verde, spicerhaart, RIVERLITE, Dataprise, SureBridge, Reed's School, Sayfol International School
Find out what your peers are saying about Mimecast Email Security vs. Sophos Email and other solutions. Updated: July 2025.
866,218 professionals have used our research since 2012.